Income Taxes - Income Tax Expense and Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Current income taxes (benefits): U.S. federal	$ (56.3)	$ 110.3	$ 15.8
Current income taxes (benefits): State	20.7	19.4	5.0
Current income taxes (benefits): Foreign	53.6	38.3	55.4
Current income taxes (benefits): Tax benefit of operating loss carryforwards	(9.5)	(1.2)	(3.3)
Total current income taxes (benefits)	8.5	166.8	72.9
Deferred income taxes (benefits): U.S. federal	1,201.3	154.6	143.6
Deferred income taxes (benefits): State	8.0	16.6	11.5
Deferred income taxes (benefits): Foreign	(9.9)	(11.8)	37.0
Total deferred income taxes (benefits)	1,199.4	159.4	192.1
Income taxes (benefits)	1,207.9	326.2	265.0
Income (loss) before income taxes
Income (loss) before income taxes - domestic	5,821.5	1,889.1	1,323.2
Income (loss) before income taxes - foreign	238.6	194.5	370.3
Income (loss) before income taxes	$ 6,060.1	$ 2,083.6	$ 1,693.5